Fenton fluidized bed

With the development of industry, various industrial production processes have put forward higher requirements for the performance and efficiency of equipment. During these processes,Fenton fluidized bedIt is a widely used device with advantages such as high efficiency, high production capacity, energy conservation, and environmental protection, and has therefore been widely used in fields such as chemical engineering, petroleum, and pharmaceuticals. Fenton fluidized bed, as a new type of fluidized bed reactor, has outstanding advantages in many aspects.

1、 Overview of Fenton fluidized bed

Fenton fluidized bed reactor, also known as Fenton oxidation tower, Fenton reactor, Fenton fluidized bed, Fenton equipment, etc. The fluidized bed Fenton oxidation tower adopts fluidized bed technology, which uses a fluidized bed to crystallize or precipitate most of the trivalent iron produced by the Fenton method and attach it to the surface of proprietary packing. It is a combination of in-phase chemical oxidation(Fenton)Heterogeneous chemical oxidation(H2O2/FeOOH)Fluid bed crystallization andFeOOHNew technologies for functions such as reduction and dissolution.

This technology has greatly improved the traditional Fenton oxidation method, reducing the dosage and sludge production. At the same time, the iron oxide formed on the surface of the packing has heterogeneous catalytic effect. The fluidized state inside the Fenton oxidation tower also promotes chemical oxidation reaction and mass transfer efficiency, makingCODImproved removal rate. The fluidized bed Fenton oxidation tower technology can be widely used in the pretreatment and advanced treatment sections of wastewater in various industries.

2、 Fenton fluidized bed principle

Fenton fluidized bed principle,hydrogen peroxide(H2O2)Compared to divalent iron ionsFe2+The mixed solution oxidizes many known organic compounds into inorganic states. The reaction has the ability to remove recalcitrant organic pollutants.

Fe2++H2O2→Fe3++ OH–+·OH①

H2O2+Fe3+→Fe2++O2+ 2H+②

O2+Fe2+→Fe3++O2– ③

According to the reaction chemistry equation, hydrogen peroxide(H2O2)Compared to divalent iron ionsFe2+Generate hydroxyl radicals in acidic environmentsOH，FentonReaction throughH2O2andFe2+Effect generatedOHIt can be seen that besides producing1MolarOHIn addition to free radicals, there is also generation1Molecule peroxyl radicalsO2·However, the oxidation potential of peroxide radicals is only1.3 VLeft and right, so the main oxidant in Fenton reagent isOHFree radicals.H2O2andFe2+The reaction between them is fast, thereforeFentonThe reaction can oxidize most organic compounds in water.

3、 Fenton fluidized bed advantage

The Fenton fluidized bed reactor is a device that suspends catalysts or reactants in a high-speed airflow and carries out reactions. In a Fenton fluidized bed, catalysts or reactants are introduced into the reactor by a gas flow, forming a mixture between particles and gas. This mixture is calledFluidized bed "refers to the free flow of catalyst or reactant particles within the bed, forming a liquid like bed.

1Compared to traditional Fenton, it reduces iron salts andH2O2The dosage of medication greatly reduces operating costs.

2Compared with traditional Fenton, the sludge production is lower, and the sludge volume is generally less than traditional Fenton70%.

3Compared with traditional Fenton, the tank has dedicated filling materials that can be adjusted according to the type of wastewater, resulting in a wider range of applications and better effects.

4Compared with traditional Fenton, it has shorter reaction time, smaller equipment size, and greatly saves floor space.

5The material of the fluidized bed Fenton oxidation tower body is selected from carbon steel or fiberglass, stainless steel, with a long service life and basically no need for maintenance.

In a Fenton fluidized bed, the size and density of catalyst or reactant particles can be adjusted according to actual needs. These particles are efficiently stirred and mixed in the reactor, allowing the reactants to quickly come into contact and react. Meanwhile, by controlling the speed and flow rate of the airflow, precise control of the reaction process can be achieved.

4、 Application scope

1Pre treatment of high difficulty wastewater: such as used in pre-treatment sections of high difficulty wastewater treatment in papermaking, petrochemical, agrochemical, chemical, pharmaceutical, leather, textile industries, etc., greatly reducing organic pollution in wastewater and improving its biodegradability.

2Deep treatment, used for effluent control: can be used at the end of various wastewater treatment facilities as a deep treatment facility for effluent control.

3Decolorization treatment: Fluidized bed Fenton oxidation tower can be used to decolorize wastewater, such as decolorizing the effluent in the final stage of papermaking, dyeing and finishing wastewaterCODEnsure that the effluent meets the discharge standards.

5、 The role of Fenton fluidized bed

Fenton fluidized bed, as an efficient industrial reactor, has the following functions:

1. Improve reaction speed and productivity: In a Fenton fluidized bed, catalyst or reactant particles are thoroughly stirred and mixed, allowing reactant molecules to come into contact and react faster. This helps to improve reaction speed and production capacity, thereby increasing the efficiency and output of the entire industrial process.

2. Optimizing reaction conditions: By controlling parameters such as gas flow rate, flow rate, catalyst or reactant particle size and density, reaction conditions can be optimized to achieve precise control of the reaction process. This helps to improve product quality and yield, reduce energy consumption and environmental pollution.

3. Enhanced heat and mass transfer: In a Fenton fluidized bed, there is a strong interaction between catalyst or reactant particles and gas, which helps to enhance heat and mass transfer processes. By optimizing the reaction conditions of the fluidized bed, the efficiency of heat and mass transfer can be improved, thereby reducing energy consumption and improving product purity and yield.

4. Reduce equipment investment and operating costs: Fenton fluidized bed has the advantages of simple structure, small volume, and light weight, which can reduce equipment investment costs. Meanwhile, due to its advantages of high efficiency and low energy consumption, it can reduce operating costs and extend the service life of equipment.

5. Adapt to various processes and products: Fenton fluidized bed has flexible process operation characteristics and can adapt to different process and product requirements. For example, it can be applied to different types of processes such as oxidation, reduction, polymerization, and cracking, and can be adjusted and optimized as needed.

In summary, the Fenton fluidized bed reactor is an important industrial reactor that has been widely used in fields such as chemical engineering, petroleum, and pharmaceuticals. By using Fenton fluidized bed, industrial production efficiency and product quality can be improved, energy consumption and environmental pollution can be reduced. With the continuous development of industrial technology, the application prospects of Fenton fluidized bed will be even broader in the future.

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